android datepicker timepicker简单用法

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/White" 
    android:orientation="vertical">
    <RelativeLayout
        android:id="@+id/titlebar"
        android:layout_height="@dimen/titlebar_height"
        android:layout_width="match_parent"
        android:background="@color/vi_color"
        >

        <ImageView
             android:id="@+id/arrowLeftImg"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_centerVertical="true"
             android:layout_marginLeft="5dp"
             android:src="@drawable/icon_arrow_left_white"
              />
        <TextView 
             android:id = "@+id/title"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:textColor="@color/White"
             android:textSize="@dimen/titlebar_title_text_size"
             android:layout_centerVertical="true"
             android:layout_centerHorizontal="true"
             android:layout_centerInParent="true"
             android:text="@string/choose_time"/>

    </RelativeLayout>
    <DatePicker 
        android:id="@+id/datePicker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:calendarViewShown="false"
        android:layout_gravity="center"
        android:contentDescription="设置时间"/>
    <!-- <TimePicker 
        android:id="@+id/timePicker"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        
        android:layout_marginTop="10dp"/> -->
    <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="120dp"
         android:orientation="vertical"
         android:layout_weight="1">

          <TextView
               android:layout_width="match_parent"
               android:id = "@+id/tvTimeShow"
               android:layout_height="0dp"
               android:layout_weight="1"
               android:gravity="center"
               android:layout_margin="10dp"/>
          <Button 
              android:layout_width="match_parent"
              android:layout_height="wrap_content"
              android:id = "@+id/btnCommit"
              android:text="@string/ok"
              android:background="@drawable/sel_publish_button"/>
     </LinearLayout>
</LinearLayout>

datePicker = (DatePicker) findViewById(R.id.datePicker);
        mBtnCommit = (Button) findViewById(R.id.btnCommit);
        mTvTimeShow = (TextView) findViewById(R.id.tvTimeShow);
calendar = Calendar.getInstance(); 
        dateFormat = new SimpleDateFormat("yyyy年MM月dd日");
        mTvTimeShow.setText("服务起始日期:  "+dateFormat.format(calendar.getTime()));
        datePicker.init(calendar.get(calendar.YEAR), calendar.get(calendar.MONTH), calendar.get(calendar.DAY_OF_MONTH), 
                new OnDateChangedListener(){
                    @Override
                    public void onDateChanged(DatePicker view, int year,
                            int month, int day) {
                        calendar.set(year, month, day);                        
                        mTvTimeShow.setText("服务起始日期:  "+dateFormat.format(calendar.getTime()));
                    }            
        });
        /*timePicker.setIs24HourView(false);
        timePicker.setOnTimeChangedListener(new OnTimeChangedListener(){
            @Override
            public void onTimeChanged(TimePicker view, int hour, int minute) {
                //calendar.set(year, month, day, hourOfDay, minute);
            }            
        });*/